Sanyo rolled out its mini digital pocket heater 'KIR-S1' in Korea market. Running on lithium-ion battery, the KIR-S1 supports about 5 hours heating. You can adjust the intensity. The temperatures goes to 43-degree to prevent from getting burnt. It measures 84 x 62 x 19mm(L X W x H) at 85g. Suggested price is 37,800(KRW).